CEDAR: Polar Summer Mesospheric Dynamics from Cloud Tracking with AIM CIPS (Aeronomy of Ice Cloud Imaging and Particle Size) Imagery

这项研究的主要目标是提高对极地夏季中间层动力学及其与低层大气的耦合的认识。该方法是基于应用全面的数据分析，以大型合奏的水平风和重力波（GW）的结构来自冰在中间层（AIM）卫星极地中间层云（PMC）的观测。水平风将使用云风跟踪算法得出，该算法应用于在PMC表格的每个蝴蝶结图像内检测到的全套GW结构。云探测和GW分析将应用于由AIM云成像和颗粒大小实验仪器（2007年至今）对北方和南半球（北半球和南半球）进行的PMC测量。这些风将根据每月气候学或通过个别风推导的巧合比较进行验证。本科生和研究生的参与是预期的。基于这些结果，两个科学目标将进行研究。 第一个目标是量化每种GW形态的GW发生频率。这些结果将被探索，以确定可能的GW源区域，并考虑风过滤条件，导致本地GW激发或GW事件的向上和极向传播的观察现场。另一个科学目标是研究修正卫星混叠效应后的快速行进行星波（PW）。这些PW事件将允许的问题的变异性进行检查的PW活动的年际变化，在中层风和PMC的大气层在AIM使命期间（2007年至今）。 这些结果还将确定PW活动与极地冬季平流层涡旋强度或对半球涡旋内部温度之间是否存在任何半球间的远程联系。这种远程连接将有助于了解极地夏季PW发展背后的驱动机制的细节。

The primary goal of this research is to achieve improved understanding of polar summer mesospheric dynamics and its coupling to the lower atmosphere. The methodology is based upon applying comprehensive data analyses to large ensembles of horizontal winds and gravity wave (GW) structures derived from the Aeronomy of Ice in the Mesosphere (AIM) satellite polar mesospheric cloud (PMC) observations. Horizontal winds will be derived using a cloud wind tracking algorithm applied to a full set of GW structures detected within each bowtie image of PMC forms. The cloud detection and GW analysis would be applied to the PMC measurements taken by the AIM Cloud Imaging and Particle Size experiment (CIPS) instrument (2007-current) for both northern and southern hemispheres (NH and SH). These winds would be validated in terms of monthly climatology or via coincidence comparisons for individual wind derivations. Undergraduate and graduate student participation is expected.Based on these results, two science objectives would be studied. The first objective would be the quantification of the occurrence frequency of GWs for each type of GW morphology. These results would be explored to determine possible GW source regions and to consider the wind filtering conditions that lead to either local GW excitation or the upward and poleward propagation of the GW event to the site of the observation. The other science objective is to study the fast traveling planetary waves (PWs) after correcting for the satellite aliasing effect. These PW events would allow the question of variability be examined regarding the inter-annual variability of the PW activity seen in the mesospheric winds and PMC albedo over the AIM mission period (2007-current). These results would also determine whether any inter-hemispheric tele-connection exists between the PW activity and the polar winter stratospheric vortex strength or temperature inside the vortex in the opposite hemisphere. Such a tele-connection would contribute toward understanding the details of the driving mechanism underlying the development of the polar summer PWs.